First, when it comes to matters of this nature, we may discover the wisdom behind it or we may not. There are many things concerning which we do not know their wisdom. As Allah has said,
'' And they ask you about the ruh (Spirit). Say: As for the Ruh, its knowledge is with my Lord. And of knowledge, you (mankind) have been given only a little. ” (al-Isra 85)
As for that creation, it is as if the person would have asked me why did Allah create the camel in the form that it is in, or the horse, or the donkey, or human being, and questions such as that. Or if he would have asked me why Allah has made the Dhuhr prayer four rakats, Asr four and Isha four. As for questions of that matter, we cannot know their wisdom, as otherwise one might ask, why did Allah not make it eight or six rakahs. Therefore, we know that with respect to this creation and with respect to many aspects of the Shariah, the wisdom behind them is simply hidden from us. However, if we do know some of the wisdom behind some of Allah’s creation or parts of the Shariah , it is because Allah has given that to us and that is simply a greater excellence, knowledge and goodness. However, if we do not have knowledge, we are not losing anything.
Now let me return to the question. What is the wisdom behind creating honourable, recording angels that know everything we do? The wisdom behind that is that it demonstrates that Allah has ordered all things and has laid down in perfection, to the extent that He has put above the actions of mankind noble recorders who are responsible for recording everything they do before they even do it. All of this is part of Allah’s complete looking after of humans and His complete wisdom in this creation.
Allah Knows best.